base stylesheet.hash on css content, and revert parsed.hash

src/css/Stylesheet.ts

@@ -3,6 +3,7 @@ import { walk } from 'estree-walker';
 import { getLocator } from 'locate-character';
 import Selector from './Selector';
 import getCodeFrame from '../utils/getCodeFrame';
+import hash from '../utils/hash';
 import Element from '../generators/nodes/Element';
 import { Validator } from '../validate/index';
 import { Node, Parsed, Warning } from '../interfaces';
@@ -269,12 +270,12 @@ export default class Stylesheet {
 		this.cascade = cascade;
 		this.filename = filename;
 
-		this.id = `svelte-${parsed.hash}`;
-
 		this.children = [];
 		this.keyframes = new Map();
 
 		if (parsed.css && parsed.css.children.length) {
+			this.id = `svelte-${hash(parsed.css.content.styles)}`;
+
 			this.hasStyles = true;
 
 			const stack: (Rule | Atrule)[] = [];

src/parse/index.ts

@@ -6,7 +6,7 @@ import { trimStart, trimEnd } from '../utils/trim';
 import getCodeFrame from '../utils/getCodeFrame';
 import reservedNames from '../utils/reservedNames';
 import fullCharCodeAt from '../utils/fullCharCodeAt';
-import hash from './utils/hash';
+import hash from '../utils/hash';
 import { Node, Parsed } from '../interfaces';
 import CompileError from '../utils/CompileError';
 
@@ -202,20 +202,13 @@ export class Parser {
 	}
 }
 
-function getHashSource (parser: Parser, options: ParserOptions) {
-	if (options.css === false || !parser.css) {
-		return parser.template;
-	}
-	return parser.css.content.styles;
-}
-
 export default function parse(
 	template: string,
 	options: ParserOptions = {}
 ): Parsed {
 	const parser = new Parser(template, options);
 	return {
-		hash: hash(getHashSource(parser, options)),
+		hash: hash(parser.template),
 		html: parser.html,
 		css: parser.css,
 		js: parser.js,